Improvement in treadles for sewing-machines



M.H. KNAPP.

Treadles forSewing-Machines. N No. 142,704. A PatentedSeptembermmn,

NTTED STATES PATENT OFFICE.

MYRON H. KNAPP, OF FULTON, NEW YORK.

IMPROVEMENT IN TREADLES FR SEWING-MACHINES.

Specification forming part of Letters Patent No. 142,704, dated September 9, 1873 application filed July 25, 1873.

that of the single treadle, where the feet are lnoved in unison. The invention consists in two pedals pivoted on the lower shaft of the frame, the one being connected by a rod from an offset at its front end to the crank-pin of the driving-wheel, and the other by a rod connecting an offset from its rear end to the said crank-pin, or, when applied to the machine as ordinarily constructed, to a wrist near the top of the usual connecting-rod.

A represents a portion of the standard of a sewingmachine, and B the drivingwheel mounted on a shaft journaled in the standard, and having a Wrist-pin, a. O is a shaft at the lower part of the standard, on which the pedals D D are sleeved independently of each other. The right pedal D is molded with an offset'eXtending laterally to the right and rear from its heel, with a wrist at its extremity, which is connected to the wrist of the drivingwheel by a pitman, E. The left pedal D has now in use the machine can always be started in the right direction by the foot.

Where the improvement is to be applied to a machine having the ordinary single treadle, one pitman may be pivoted at its upper end to a Wrist projecting from the other pitman near its top, which is connected to the wrist or crank pin of the driving-wheel; or a new p wrist-pin long enough to have both pitmen strapped to it may be supplied.

By means of cones the pedals D D may be fitted to most sewing-machines now made.

What I claim as my invention, and desire to secure by Letters Patent, is-

rlhe pedals D Dl and pitman-rods E E constructed and arranged, with relation to the shaft O, and wrist a, and driving-wheel B of a sewing-machine, substantially as and for the purpose set forth.

MYRON H. KNAPP.

Witnesses:

EDMUND BARTLETT, WILLIAM MONROE. 

